/* Generated By:JavaCC: Do not edit this line. SheetFormulaParser.java */
package org.simantics.spreadsheet.solver.formula.parser;

import org.simantics.spreadsheet.solver.formula.parser.ast.*;
import java.util.ArrayList;
import java.util.List;
import java.util.Collections;

/**
 * Parser for spreadsheet formulas
 * @author Antti Villberg
 */
public class SheetFormulaParser implements SheetFormulaParserConstants {

  final public AstValue primary() throws ParseException {
    Token tok;
    AstValue temp;
    AstRange tempRange;
    switch ((jj_ntk==-1)?jj_ntk():jj_ntk) {
    case 27:
      jj_consume_token(27);
             {if (true) return AstNull.NULL;}
      break;
    case 25:
      jj_consume_token(25);
             {if (true) return AstBoolean.TRUE;}
      break;
    case 26:
      jj_consume_token(26);
              {if (true) return AstBoolean.FALSE;}
      break;
    case 28:
      jj_consume_token(28);
             {if (true) return AstBoolean.TRUE;}
      break;
    case 29:
      jj_consume_token(29);
              {if (true) return AstBoolean.FALSE;}
      break;
    case STRING:
      jj_consume_token(STRING);
               {if (true) return new AstString(token.image);}
      break;
    case LONG_STRING:
      jj_consume_token(LONG_STRING);
                    {if (true) return new AstString(token.image);}
      break;
    case FLOAT:
      jj_consume_token(FLOAT);
              {if (true) return new AstDouble(token.image);}
      break;
    case INTEGER:
      jj_consume_token(INTEGER);
                {if (true) return new AstInteger(Integer.parseInt(token.image));}
      break;
    default:
      jj_la1[1] = jj_gen;
      if (jj_2_1(2)) {
        switch ((jj_ntk==-1)?jj_ntk():jj_ntk) {
        case IDENT:
          tok = jj_consume_token(IDENT);
          break;
        case SHEET_NAME:
          tok = jj_consume_token(SHEET_NAME);
          break;
        default:
          jj_la1[0] = jj_gen;
          jj_consume_token(-1);
          throw new ParseException();
        }
        jj_consume_token(42);
        tempRange = range();
                                                                                {if (true) return tempRange.inSheet(tok.image);}
      } else if (jj_2_2(2)) {
        temp = apply();
                                  {if (true) return temp;}
      } else {
        switch ((jj_ntk==-1)?jj_ntk():jj_ntk) {
        case 5:
          jj_consume_token(5);
          temp = relation();
          jj_consume_token(6);
                                {if (true) return temp;}
          break;
        case CELL_SINGLE:
        case CELL_RANGE:
        case 43:
          temp = range();
                     {if (true) return temp;}
          break;
        case 10:
          temp = array();
                     {if (true) return temp;}
          break;
        case IDENT:
          jj_consume_token(IDENT);
              {if (true) return new AstIdentifier(token.image);}
          break;
        default:
          jj_la1[2] = jj_gen;
          jj_consume_token(-1);
          throw new ParseException();
        }
      }
    }
    throw new Error("Missing return statement in function");
  }

  final public AstApply apply() throws ParseException {
    AstArgList al;
    Token tok;
    if (jj_2_3(3)) {
      tok = jj_consume_token(IDENT);
      jj_consume_token(5);
      jj_consume_token(6);
                                       {if (true) return new AstApply(tok.image, null);}
    } else {
      switch ((jj_ntk==-1)?jj_ntk():jj_ntk) {
      case IDENT:
        tok = jj_consume_token(IDENT);
        jj_consume_token(5);
        al = arglist();
        jj_consume_token(6);
                                         {if (true) return new AstApply(tok.image, al);}
        break;
      default:
        jj_la1[3] = jj_gen;
        jj_consume_token(-1);
        throw new ParseException();
      }
    }
    throw new Error("Missing return statement in function");
  }

  final public AstValue array() throws ParseException {
    AstArray arr = new AstArray();
    AstValue temp;
    if (jj_2_4(2)) {
      jj_consume_token(10);
      jj_consume_token(11);
                         {if (true) return new AstArray();}
    } else {
      switch ((jj_ntk==-1)?jj_ntk():jj_ntk) {
      case 10:
        jj_consume_token(10);
        temp = relation();
                          arr.add(temp);
        jj_consume_token(18);
        label_1:
        while (true) {
          switch ((jj_ntk==-1)?jj_ntk():jj_ntk) {
          case 5:
          case 10:
          case 13:
          case 14:
          case 25:
          case 26:
          case 27:
          case 28:
          case 29:
          case STRING:
          case SHEET_NAME:
          case LONG_STRING:
          case CELL_SINGLE:
          case CELL_RANGE:
          case IDENT:
          case FLOAT:
          case INTEGER:
          case 43:
          case 46:
            ;
            break;
          default:
            jj_la1[4] = jj_gen;
            break label_1;
          }
          temp = relation();
                                                                     arr.add(temp);
        }
        jj_consume_token(11);
                                                                                               {if (true) return arr;}
        break;
      default:
        jj_la1[5] = jj_gen;
        jj_consume_token(-1);
        throw new ParseException();
      }
    }
    throw new Error("Missing return statement in function");
  }

  final public AstRange range() throws ParseException {
    Token temp1;
    Token temp2;
    if (jj_2_5(2)) {
      jj_consume_token(CELL_RANGE);
                              {if (true) return new AstRange(token.image);}
    } else {
      switch ((jj_ntk==-1)?jj_ntk():jj_ntk) {
      case CELL_SINGLE:
        jj_consume_token(CELL_SINGLE);
                     {if (true) return new AstRange(token.image);}
        break;
      case 43:
        jj_consume_token(43);
               {if (true) return AstRange.REF;}
        break;
      default:
        jj_la1[6] = jj_gen;
        jj_consume_token(-1);
        throw new ParseException();
      }
    }
    throw new Error("Missing return statement in function");
  }

  final public AstArgList arglist() throws ParseException {
    AstArgList ret = new AstArgList();
    AstValue temp;
    temp = relation();
                       ret.add(temp);
    label_2:
    while (true) {
      switch ((jj_ntk==-1)?jj_ntk():jj_ntk) {
      case 4:
      case 18:
        ;
        break;
      default:
        jj_la1[7] = jj_gen;
        break label_2;
      }
      switch ((jj_ntk==-1)?jj_ntk():jj_ntk) {
      case 4:
        jj_consume_token(4);
        break;
      case 18:
        jj_consume_token(18);
        break;
      default:
        jj_la1[8] = jj_gen;
        jj_consume_token(-1);
        throw new ParseException();
      }
                temp = AstNothing.INSTANCE;
      switch ((jj_ntk==-1)?jj_ntk():jj_ntk) {
      case 5:
      case 10:
      case 13:
      case 14:
      case 25:
      case 26:
      case 27:
      case 28:
      case 29:
      case STRING:
      case SHEET_NAME:
      case LONG_STRING:
      case CELL_SINGLE:
      case CELL_RANGE:
      case IDENT:
      case FLOAT:
      case INTEGER:
      case 43:
      case 46:
        temp = relation();
        break;
      default:
        jj_la1[9] = jj_gen;
        ;
      }
                                                                     ret.add(temp);
    }
                                                                                            {if (true) return ret;}
    throw new Error("Missing return statement in function");
  }

  final public AstValue relation() throws ParseException {
  AstRelation ret;
  String op;
  AstValue ex;
    ex = arithmetic_expression();
                                        ret = new AstRelation(ex);
    switch ((jj_ntk==-1)?jj_ntk():jj_ntk) {
    case 21:
    case 22:
    case 23:
    case 24:
    case 44:
    case 45:
      op = rel_op();
      ex = arithmetic_expression();
                                                                                                                        ret.setRight(op, ex);
      break;
    default:
      jj_la1[10] = jj_gen;
      ;
    }
                                                                                                                                                     {if (true) return ret.simplify();}
    throw new Error("Missing return statement in function");
  }

  final public String rel_op() throws ParseException {
    switch ((jj_ntk==-1)?jj_ntk():jj_ntk) {
    case 22:
      jj_consume_token(22);
              {if (true) return "< ";}
      break;
    case 44:
      jj_consume_token(44);
                                     {if (true) return "<=";}
      break;
    case 23:
      jj_consume_token(23);
                                                           {if (true) return " >";}
      break;
    case 45:
      jj_consume_token(45);
                                                                                  {if (true) return " >=";}
      break;
    case 21:
      jj_consume_token(21);
                                                                                                         {if (true) return "=";}
      break;
    case 24:
      jj_consume_token(24);
                                                                                                                               {if (true) return "<>";}
      break;
    default:
      jj_la1[11] = jj_gen;
      jj_consume_token(-1);
      throw new ParseException();
    }
    throw new Error("Missing return statement in function");
  }

//   
  final public AstValue arithmetic_expression() throws ParseException {
    AstArithmeticExpression ret;
    String op = null;
    AstValue temp;
    switch ((jj_ntk==-1)?jj_ntk():jj_ntk) {
    case 13:
    case 14:
    case 46:
      op = add_op();
      break;
    default:
      jj_la1[12] = jj_gen;
      ;
    }
    temp = term();
                                   ret = new AstArithmeticExpression(op, temp);
    label_3:
    while (true) {
      if (jj_2_6(2)) {
        ;
      } else {
        break label_3;
      }
      op = add_op();
      temp = term();
                                                                                                                               ret.add(op, temp);
    }
                                                                                                                                                         {if (true) return ret.simplify();}
    throw new Error("Missing return statement in function");
  }

  final public String add_op() throws ParseException {
    switch ((jj_ntk==-1)?jj_ntk():jj_ntk) {
    case 14:
      jj_consume_token(14);
          {if (true) return "+";}
      break;
    case 46:
      jj_consume_token(46);
                               {if (true) return "-";}
      break;
    case 13:
      jj_consume_token(13);
                                                    {if (true) return "&";}
      break;
    default:
      jj_la1[13] = jj_gen;
      jj_consume_token(-1);
      throw new ParseException();
    }
    throw new Error("Missing return statement in function");
  }

  final public AstValue term() throws ParseException {
    AstTerm ret;
    String op;
    AstValue temp;
    temp = factor();
                    ret = new AstTerm(temp);
    label_4:
    while (true) {
      switch ((jj_ntk==-1)?jj_ntk():jj_ntk) {
      case 15:
      case 16:
        ;
        break;
      default:
        jj_la1[14] = jj_gen;
        break label_4;
      }
      op = mul_op();
      temp = factor();
                                                                                ret.add(op, temp);
    }
                                                                                                          {if (true) return ret.simplify();}
    throw new Error("Missing return statement in function");
  }

  final public String mul_op() throws ParseException {
    switch ((jj_ntk==-1)?jj_ntk():jj_ntk) {
    case 15:
      jj_consume_token(15);
          {if (true) return "*";}
      break;
    case 16:
      jj_consume_token(16);
                               {if (true) return "/";}
      break;
    default:
      jj_la1[15] = jj_gen;
      jj_consume_token(-1);
      throw new ParseException();
    }
    throw new Error("Missing return statement in function");
  }

  final public AstValue factor() throws ParseException {
    AstFactor ret;
    String op;
    AstValue temp;
    temp = primary();
                     ret = new AstFactor(temp);
    label_5:
    while (true) {
      switch ((jj_ntk==-1)?jj_ntk():jj_ntk) {
      case 17:
        ;
        break;
      default:
        jj_la1[16] = jj_gen;
        break label_5;
      }
      op = factor_op();
      temp = primary();
                                                                                       ret.add(op, temp);
    }
                                                                                                                 {if (true) return ret.simplify();}
    throw new Error("Missing return statement in function");
  }

  final public String factor_op() throws ParseException {
    jj_consume_token(17);
          {if (true) return "^";}
    throw new Error("Missing return statement in function");
  }

  private boolean jj_2_1(int xla) {
    jj_la = xla; jj_lastpos = jj_scanpos = token;
    try { return !jj_3_1(); }
    catch(LookaheadSuccess ls) { return true; }
    finally { jj_save(0, xla); }
  }

  private boolean jj_2_2(int xla) {
    jj_la = xla; jj_lastpos = jj_scanpos = token;
    try { return !jj_3_2(); }
    catch(LookaheadSuccess ls) { return true; }
    finally { jj_save(1, xla); }
  }

  private boolean jj_2_3(int xla) {
    jj_la = xla; jj_lastpos = jj_scanpos = token;
    try { return !jj_3_3(); }
    catch(LookaheadSuccess ls) { return true; }
    finally { jj_save(2, xla); }
  }

  private boolean jj_2_4(int xla) {
    jj_la = xla; jj_lastpos = jj_scanpos = token;
    try { return !jj_3_4(); }
    catch(LookaheadSuccess ls) { return true; }
    finally { jj_save(3, xla); }
  }

  private boolean jj_2_5(int xla) {
    jj_la = xla; jj_lastpos = jj_scanpos = token;
    try { return !jj_3_5(); }
    catch(LookaheadSuccess ls) { return true; }
    finally { jj_save(4, xla); }
  }

  private boolean jj_2_6(int xla) {
    jj_la = xla; jj_lastpos = jj_scanpos = token;
    try { return !jj_3_6(); }
    catch(LookaheadSuccess ls) { return true; }
    finally { jj_save(5, xla); }
  }

  private boolean jj_3R_29() {
    Token xsp;
    xsp = jj_scanpos;
    if (jj_3_4()) {
    jj_scanpos = xsp;
    if (jj_3R_32()) return true;
    }
    return false;
  }

  private boolean jj_3_4() {
    if (jj_scan_token(10)) return true;
    if (jj_scan_token(11)) return true;
    return false;
  }

  private boolean jj_3R_7() {
    Token xsp;
    xsp = jj_scanpos;
    if (jj_3R_10()) {
    jj_scanpos = xsp;
    if (jj_3R_11()) {
    jj_scanpos = xsp;
    if (jj_3R_12()) return true;
    }
    }
    return false;
  }

  private boolean jj_3R_10() {
    if (jj_scan_token(14)) return true;
    return false;
  }

  private boolean jj_3R_12() {
    if (jj_scan_token(13)) return true;
    return false;
  }

  private boolean jj_3R_9() {
    if (jj_scan_token(IDENT)) return true;
    if (jj_scan_token(5)) return true;
    return false;
  }

  private boolean jj_3R_6() {
    Token xsp;
    xsp = jj_scanpos;
    if (jj_3_3()) {
    jj_scanpos = xsp;
    if (jj_3R_9()) return true;
    }
    return false;
  }

  private boolean jj_3_3() {
    if (jj_scan_token(IDENT)) return true;
    if (jj_scan_token(5)) return true;
    if (jj_scan_token(6)) return true;
    return false;
  }

  private boolean jj_3R_27() {
    if (jj_scan_token(IDENT)) return true;
    return false;
  }

  private boolean jj_3R_26() {
    if (jj_3R_29()) return true;
    return false;
  }

  private boolean jj_3R_25() {
    if (jj_3R_28()) return true;
    return false;
  }

  private boolean jj_3R_24() {
    if (jj_scan_token(5)) return true;
    return false;
  }

  private boolean jj_3_2() {
    if (jj_3R_6()) return true;
    return false;
  }

  private boolean jj_3_1() {
    Token xsp;
    xsp = jj_scanpos;
    if (jj_scan_token(38)) {
    jj_scanpos = xsp;
    if (jj_scan_token(33)) return true;
    }
    if (jj_scan_token(42)) return true;
    return false;
  }

  private boolean jj_3R_23() {
    if (jj_scan_token(INTEGER)) return true;
    return false;
  }

  private boolean jj_3_6() {
    if (jj_3R_7()) return true;
    if (jj_3R_8()) return true;
    return false;
  }

  private boolean jj_3R_22() {
    if (jj_scan_token(FLOAT)) return true;
    return false;
  }

  private boolean jj_3R_21() {
    if (jj_scan_token(LONG_STRING)) return true;
    return false;
  }

  private boolean jj_3R_20() {
    if (jj_scan_token(STRING)) return true;
    return false;
  }

  private boolean jj_3R_19() {
    if (jj_scan_token(29)) return true;
    return false;
  }

  private boolean jj_3R_18() {
    if (jj_scan_token(28)) return true;
    return false;
  }

  private boolean jj_3R_17() {
    if (jj_scan_token(26)) return true;
    return false;
  }

  private boolean jj_3R_11() {
    if (jj_scan_token(46)) return true;
    return false;
  }

  private boolean jj_3R_16() {
    if (jj_scan_token(25)) return true;
    return false;
  }

  private boolean jj_3R_13() {
    if (jj_3R_14()) return true;
    return false;
  }

  private boolean jj_3R_14() {
    Token xsp;
    xsp = jj_scanpos;
    if (jj_3R_15()) {
    jj_scanpos = xsp;
    if (jj_3R_16()) {
    jj_scanpos = xsp;
    if (jj_3R_17()) {
    jj_scanpos = xsp;
    if (jj_3R_18()) {
    jj_scanpos = xsp;
    if (jj_3R_19()) {
    jj_scanpos = xsp;
    if (jj_3R_20()) {
    jj_scanpos = xsp;
    if (jj_3R_21()) {
    jj_scanpos = xsp;
    if (jj_3R_22()) {
    jj_scanpos = xsp;
    if (jj_3R_23()) {
    jj_scanpos = xsp;
    if (jj_3_1()) {
    jj_scanpos = xsp;
    if (jj_3_2()) {
    jj_scanpos = xsp;
    if (jj_3R_24()) {
    jj_scanpos = xsp;
    if (jj_3R_25()) {
    jj_scanpos = xsp;
    if (jj_3R_26()) {
    jj_scanpos = xsp;
    if (jj_3R_27()) return true;
    }
    }
    }
    }
    }
    }
    }
    }
    }
    }
    }
    }
    }
    }
    return false;
  }

  private boolean jj_3R_15() {
    if (jj_scan_token(27)) return true;
    return false;
  }

  private boolean jj_3R_31() {
    if (jj_scan_token(43)) return true;
    return false;
  }

  private boolean jj_3R_30() {
    if (jj_scan_token(CELL_SINGLE)) return true;
    return false;
  }

  private boolean jj_3R_28() {
    Token xsp;
    xsp = jj_scanpos;
    if (jj_3_5()) {
    jj_scanpos = xsp;
    if (jj_3R_30()) {
    jj_scanpos = xsp;
    if (jj_3R_31()) return true;
    }
    }
    return false;
  }

  private boolean jj_3_5() {
    if (jj_scan_token(CELL_RANGE)) return true;
    return false;
  }

  private boolean jj_3R_8() {
    if (jj_3R_13()) return true;
    return false;
  }

  private boolean jj_3R_32() {
    if (jj_scan_token(10)) return true;
    return false;
  }

  /** Generated Token Manager. */
  public SheetFormulaParserTokenManager token_source;
  SimpleCharStream jj_input_stream;
  /** Current token. */
  public Token token;
  /** Next token. */
  public Token jj_nt;
  private int jj_ntk;
  private Token jj_scanpos, jj_lastpos;
  private int jj_la;
  private int jj_gen;
  final private int[] jj_la1 = new int[17];
  static private int[] jj_la1_0;
  static private int[] jj_la1_1;
  static {
      jj_la1_init_0();
      jj_la1_init_1();
   }
   private static void jj_la1_init_0() {
      jj_la1_0 = new int[] {0x0,0x3e000000,0x420,0x0,0x3e006420,0x400,0x0,0x40010,0x40010,0x3e006420,0x1e00000,0x1e00000,0x6000,0x6000,0x18000,0x18000,0x20000,};
   }
   private static void jj_la1_init_1() {
      jj_la1_1 = new int[] {0x42,0x305,0x868,0x40,0x4b6f,0x0,0x808,0x0,0x0,0x4b6f,0x3000,0x3000,0x4000,0x4000,0x0,0x0,0x0,};
   }
  final private JJCalls[] jj_2_rtns = new JJCalls[6];
  private boolean jj_rescan = false;
  private int jj_gc = 0;

  /** Constructor with InputStream. */
  public SheetFormulaParser(java.io.InputStream stream) {
     this(stream, null);
  }
  /** Constructor with InputStream and supplied encoding */
  public SheetFormulaParser(java.io.InputStream stream, String encoding) {
    try { jj_input_stream = new SimpleCharStream(stream, encoding, 1, 1); } catch(java.io.UnsupportedEncodingException e) { throw new RuntimeException(e); }
    token_source = new SheetFormulaParserTokenManager(jj_input_stream);
    token = new Token();
    jj_ntk = -1;
    jj_gen = 0;
    for (int i = 0; i < 17; i++) jj_la1[i] = -1;
    for (int i = 0; i < jj_2_rtns.length; i++) jj_2_rtns[i] = new JJCalls();
  }

  /** Reinitialise. */
  public void ReInit(java.io.InputStream stream) {
     ReInit(stream, null);
  }
  /** Reinitialise. */
  public void ReInit(java.io.InputStream stream, String encoding) {
    try { jj_input_stream.ReInit(stream, encoding, 1, 1); } catch(java.io.UnsupportedEncodingException e) { throw new RuntimeException(e); }
    token_source.ReInit(jj_input_stream);
    token = new Token();
    jj_ntk = -1;
    jj_gen = 0;
    for (int i = 0; i < 17; i++) jj_la1[i] = -1;
    for (int i = 0; i < jj_2_rtns.length; i++) jj_2_rtns[i] = new JJCalls();
  }

  /** Constructor. */
  public SheetFormulaParser(java.io.Reader stream) {
    jj_input_stream = new SimpleCharStream(stream, 1, 1);
    token_source = new SheetFormulaParserTokenManager(jj_input_stream);
    token = new Token();
    jj_ntk = -1;
    jj_gen = 0;
    for (int i = 0; i < 17; i++) jj_la1[i] = -1;
    for (int i = 0; i < jj_2_rtns.length; i++) jj_2_rtns[i] = new JJCalls();
  }

  /** Reinitialise. */
  public void ReInit(java.io.Reader stream) {
    jj_input_stream.ReInit(stream, 1, 1);
    token_source.ReInit(jj_input_stream);
    token = new Token();
    jj_ntk = -1;
    jj_gen = 0;
    for (int i = 0; i < 17; i++) jj_la1[i] = -1;
    for (int i = 0; i < jj_2_rtns.length; i++) jj_2_rtns[i] = new JJCalls();
  }

  /** Constructor with generated Token Manager. */
  public SheetFormulaParser(SheetFormulaParserTokenManager tm) {
    token_source = tm;
    token = new Token();
    jj_ntk = -1;
    jj_gen = 0;
    for (int i = 0; i < 17; i++) jj_la1[i] = -1;
    for (int i = 0; i < jj_2_rtns.length; i++) jj_2_rtns[i] = new JJCalls();
  }

  /** Reinitialise. */
  public void ReInit(SheetFormulaParserTokenManager tm) {
    token_source = tm;
    token = new Token();
    jj_ntk = -1;
    jj_gen = 0;
    for (int i = 0; i < 17; i++) jj_la1[i] = -1;
    for (int i = 0; i < jj_2_rtns.length; i++) jj_2_rtns[i] = new JJCalls();
  }

  private Token jj_consume_token(int kind) throws ParseException {
    Token oldToken;
    if ((oldToken = token).next != null) token = token.next;
    else token = token.next = token_source.getNextToken();
    jj_ntk = -1;
    if (token.kind == kind) {
      jj_gen++;
      if (++jj_gc > 100) {
        jj_gc = 0;
        for (int i = 0; i < jj_2_rtns.length; i++) {
          JJCalls c = jj_2_rtns[i];
          while (c != null) {
            if (c.gen < jj_gen) c.first = null;
            c = c.next;
          }
        }
      }
      return token;
    }
    token = oldToken;
    jj_kind = kind;
    throw generateParseException();
  }

  static private final class LookaheadSuccess extends java.lang.Error { }
  final private LookaheadSuccess jj_ls = new LookaheadSuccess();
  private boolean jj_scan_token(int kind) {
    if (jj_scanpos == jj_lastpos) {
      jj_la--;
      if (jj_scanpos.next == null) {
        jj_lastpos = jj_scanpos = jj_scanpos.next = token_source.getNextToken();
      } else {
        jj_lastpos = jj_scanpos = jj_scanpos.next;
      }
    } else {
      jj_scanpos = jj_scanpos.next;
    }
    if (jj_rescan) {
      int i = 0; Token tok = token;
      while (tok != null && tok != jj_scanpos) { i++; tok = tok.next; }
      if (tok != null) jj_add_error_token(kind, i);
    }
    if (jj_scanpos.kind != kind) return true;
    if (jj_la == 0 && jj_scanpos == jj_lastpos) throw jj_ls;
    return false;
  }


/** Get the next Token. */
  final public Token getNextToken() {
    if (token.next != null) token = token.next;
    else token = token.next = token_source.getNextToken();
    jj_ntk = -1;
    jj_gen++;
    return token;
  }

/** Get the specific Token. */
  final public Token getToken(int index) {
    Token t = token;
    for (int i = 0; i < index; i++) {
      if (t.next != null) t = t.next;
      else t = t.next = token_source.getNextToken();
    }
    return t;
  }

  private int jj_ntk() {
    if ((jj_nt=token.next) == null)
      return (jj_ntk = (token.next=token_source.getNextToken()).kind);
    else
      return (jj_ntk = jj_nt.kind);
  }

  private java.util.List<int[]> jj_expentries = new java.util.ArrayList<int[]>();
  private int[] jj_expentry;
  private int jj_kind = -1;
  private int[] jj_lasttokens = new int[100];
  private int jj_endpos;

  private void jj_add_error_token(int kind, int pos) {
    if (pos >= 100) return;
    if (pos == jj_endpos + 1) {
      jj_lasttokens[jj_endpos++] = kind;
    } else if (jj_endpos != 0) {
      jj_expentry = new int[jj_endpos];
      for (int i = 0; i < jj_endpos; i++) {
        jj_expentry[i] = jj_lasttokens[i];
      }
      jj_entries_loop: for (java.util.Iterator<?> it = jj_expentries.iterator(); it.hasNext();) {
        int[] oldentry = (int[])(it.next());
        if (oldentry.length == jj_expentry.length) {
          for (int i = 0; i < jj_expentry.length; i++) {
            if (oldentry[i] != jj_expentry[i]) {
              continue jj_entries_loop;
            }
          }
          jj_expentries.add(jj_expentry);
          break jj_entries_loop;
        }
      }
      if (pos != 0) jj_lasttokens[(jj_endpos = pos) - 1] = kind;
    }
  }

  /** Generate ParseException. */
  public ParseException generateParseException() {
    jj_expentries.clear();
    boolean[] la1tokens = new boolean[47];
    if (jj_kind >= 0) {
      la1tokens[jj_kind] = true;
      jj_kind = -1;
    }
    for (int i = 0; i < 17; i++) {
      if (jj_la1[i] == jj_gen) {
        for (int j = 0; j < 32; j++) {
          if ((jj_la1_0[i] & (1<<j)) != 0) {
            la1tokens[j] = true;
          }
          if ((jj_la1_1[i] & (1<<j)) != 0) {
            la1tokens[32+j] = true;
          }
        }
      }
    }
    for (int i = 0; i < 47; i++) {
      if (la1tokens[i]) {
        jj_expentry = new int[1];
        jj_expentry[0] = i;
        jj_expentries.add(jj_expentry);
      }
    }
    jj_endpos = 0;
    jj_rescan_token();
    jj_add_error_token(0, 0);
    int[][] exptokseq = new int[jj_expentries.size()][];
    for (int i = 0; i < jj_expentries.size(); i++) {
      exptokseq[i] = jj_expentries.get(i);
    }
    return new ParseException(token, exptokseq, tokenImage);
  }

  /** Enable tracing. */
  final public void enable_tracing() {
  }

  /** Disable tracing. */
  final public void disable_tracing() {
  }

  private void jj_rescan_token() {
    jj_rescan = true;
    for (int i = 0; i < 6; i++) {
    try {
      JJCalls p = jj_2_rtns[i];
      do {
        if (p.gen > jj_gen) {
          jj_la = p.arg; jj_lastpos = jj_scanpos = p.first;
          switch (i) {
            case 0: jj_3_1(); break;
            case 1: jj_3_2(); break;
            case 2: jj_3_3(); break;
            case 3: jj_3_4(); break;
            case 4: jj_3_5(); break;
            case 5: jj_3_6(); break;
          }
        }
        p = p.next;
      } while (p != null);
      } catch(LookaheadSuccess ls) { }
    }
    jj_rescan = false;
  }

  private void jj_save(int index, int xla) {
    JJCalls p = jj_2_rtns[index];
    while (p.gen > jj_gen) {
      if (p.next == null) { p = p.next = new JJCalls(); break; }
      p = p.next;
    }
    p.gen = jj_gen + xla - jj_la; p.first = token; p.arg = xla;
  }

  static final class JJCalls {
    int gen;
    Token first;
    int arg;
    JJCalls next;
  }

}